JP6684140B2 - Notched bag - Google Patents

Description

  The present invention relates to a notched bag.

BACKGROUND ART As a bag, a bag is well known in which one film is folded and overlapped, or two or more films are overlapped and a seal portion is adhered at upper and lower portions and peripheral portions of both sides thereof.
In addition, the side seal part is provided with a notch as an opening start part, and the user holds the upper side of the bag with one hand while holding the lower side of the bag with the other hand, and holds both hands relatively in that state. To move in different directions. By such an operation, two films, that is, the front film on the front side and the back film on the back side, which face each other of the bag, are simultaneously torn by the notch, and the opening is formed by cutting the upper side of the torn part. Notched bags are also well known.

In such a bag, it is difficult to open the opening at the opening edge where the edge of the front film and the edge of the back film of the opening formed by tearing coincide with each other, and it is difficult to open.
To make it easier to open the opening of the bag, it is possible to make the edges of the opening of the front film and the back film of the bag main body at the time of opening different from each other and not at the same position so that the opening has a step. Become. This is because if there is a step in the opening, any one of the front film and the back film which is displaced by the step and protrudes outward can be easily grasped, and the subsequent opening can be facilitated.
Such a stepped opening is at least a part of the edge of each film formed by tearing the front film and the back film of the bag and the two films at the same time, for example, the end of the opening when the films are overlapped. The central part of the edge is formed by being torn at different positions with a step.
Here, the end portion of the opening end edge in a state where the films are overlapped with each other corresponds to the end edge of the sealed side portion and is a portion derived from the notch which is the opening start portion of the bag. In the portion derived from this notch, the edges of the openings of the two films are completely aligned.

  In order to make the stepped opening easy to open, when opening the bag, from the part derived from the notch of the opening edge where the opening edge is completely aligned, as the tear progresses, the surface film The edges of the backing film will be misaligned and will be torn with a step.

  Bags with notches that can form such stepped openings are disclosed in, for example, Patent Documents 1 and 2.

In Patent Document 1, adjacent to the inside of the outer edge heat seal portion, at a position facing the notch, intersects with an extension line in the tearing direction from the notch, and one end is located inside an intersection with the extension line. Further, there is disclosed a packaging bag in which a step-cutting guide notch deviated from the extension line is formed on the front surface portion or the back surface portion.
In the packaging bag of Patent Document 1, a crack starting from the notch propagates and is displaced by the guide notch, so that one of the front surface portion and the back surface portion projects.

Further, in Patent Document 2, it is composed of a laminated body having an outer layer having an edge heat-bonded portion at opposing edges, an intermediate layer and an inner layer, and one edge layer of the laminated body is provided with one of the edge heat-bonded portions. With one outer edge as a starting point, the first cut line that continues from the other starting point and the other outer edge having the same position in the direction parallel to the edge thermal bonding portion as an end point, and the other outer layer of the laminated body, the edge. A second cut line is formed with one outer edge of the edge heat-bonded portion as a starting point and the other outer edge having the same position in a direction parallel to the edge heat-bonded portion as an end point, and the first cut line of the packaging bag. When assuming a virtual straight line connecting the starting point and the end point in the substantially central portion of the packaging bag in a plan view, it is composed of a cut line swelling to the upper end side and a cut line swelling to the lower end side with respect to the virtual straight line. A featured packaging bag is disclosed.
In the packaging bag of Patent Document 2, when opened by tearing from the notch, by opening along the first and second cut lines having a mismatched portion in a plan view state, the outer contour of the opening is different, Steps can be formed for easy opening with fingers.

JP, 2004-238047, A JP 2012-96839 A

In the packaging bag of Patent Document 1, since the crevice starting from the notch needs to intersect with the guide notch, it is necessary to accurately align the notch and the step cutting guide notch at the time of manufacturing.
In the packaging bag of Patent Document 2, the first and second cut lines are coincident with each other and come into contact with the outer edge, or various notches are provided as the opening start means serving as a starting point of opening at the contact position with the cut lines. It is necessary to provide them in agreement.

The notch of the bag is formed by providing a punching device for punching in the bag making machine and punching the film at the sealing portion by the punching device in the bag manufacturing process. However, when the punching device punches the film, the film is not always punched accurately at the position of the step-cutting guide notch or the position of the score line. For this reason, the position of the stress concentration part, which becomes the tear start part of the notch, may not coincide with the target position and may shift to some extent.
If the notch is displaced to some extent in this manner, when the notch is torn, the film cannot be torn along the intended line, but the film is torn at random and opened. In addition, the cracks starting from the notches did not progress in a certain direction, and the mode for tearing was not always achieved. For this reason, it may not be possible to open the container properly, and a solution to this problem has been desired.

The present invention was made in view of such circumstances, from those first planned position during the bag making, even if the forming position of the notch is shifted, which can tear the film in a manner of interest An object is to provide a notched bag having a notch.

In order to solve the above problems, the inventors of the present application have made extensive studies, and as a result, the conventional notch has a direction in which the direction of the notch tip, which is the stress concentration part of the notch, connects both sides of the bag with a straight line, the bag. In the case of the rectangular bag, it was found that this is because it is coincident with the line connecting the two opposite sides with the shortest distance. Therefore, the inventors of the present application set the tearing direction starting from the notch to an arbitrary direction (upward or downward direction of the bag) by displacing the direction of the tip end of the notch from this line, and a cutting line formed when tearing from the notch The present invention was completed by finding that the position of can be set to any position.
That is, the notched bag of the present invention was solved by the following means.

A notched bag according to an aspect of the present invention is formed in a bag shape by stacking a first laminated film and a second laminated film that face each other, and the first laminated film and the second laminated film have a peripheral portion thereof. A notched bag that is opened by tearing from a V-shaped tip portion of a notch provided in the seal portion, the notch having two linear portions. , The V-shaped tip portion, and the two linear portions and two connecting portions connecting the V-shaped tip portions, the two linear portions being based on the side edges of the bag. The V-shaped tip is formed as an end and is parallel to each other in the vertical direction so as to be perpendicular to the extending direction of the seal portion, and the V-shaped tip has a center line that bisects the V-shaped tip. It is characterized by a V-shaped tip that is inclined with respect to the vertical direction of the bag. That.

According to this configuration, the notched bag is formed in a bag shape by stacking the first laminated film and the second laminated film which face each other, and the first laminated film and the second laminated film have upper and lower portions and both side portions thereof. Has a band-shaped seal portion bonded at the peripheral edge thereof. A notch having a V-shaped tip portion is formed in the band-shaped seal portion. The notch has two straight portions, a V-shaped tip portion, and two connecting portions connecting the two straight portions and the V-shaped tip portion. The two straight portions are formed in parallel with each other in the vertical direction so that the end edges of the side portions of the bag are base ends and are perpendicular to the extending direction of the seal portion. The V-shaped tip is a V-shaped tip in which the center line that divides the V-shaped tip into two is inclined with respect to the vertical direction of the notched bag. Due to the shape of the V-shaped tip, the cutting direction starting from the V-shaped tip is upward or downward with respect to the notched bag. Then, the notched bag is torn from the V-shaped tip of the notch and opened.
Therefore, according to the present configuration, the tearing direction can be any direction of the upward direction or the downward direction of the bag, and a packaging bag with a notch can be designed based on this. Further, from a position equivalent first scheduled during bag making, even if the forming position of the notch is shifted, since the direction tear starting from the notch are arbitrary direction unchanged, notched laminate film is torn in a manner of interest Allows you to get a bag.
Further, according to this configuration, the force is concentrated in the tip direction of the V-shaped tip portion regardless of the direction of the force applied to the notch, and the tearing direction is guided along the line that is the tip direction. The tearing direction starting from the notch can be more surely set to the upward direction or the downward direction.

  In the above aspect, the angle formed by the center line that bisects the V-shaped tip portion and the straight line parallel to the band-shaped seal portion may be 10 degrees to 70 degrees.

  According to this configuration, the tearing direction starting from the notch can be more surely set to the upward direction or the downward direction.

  In the above one aspect, the most distal end of the V-shaped tip may have an arc shape with a radius of curvature of 3/100 mm to 30/100 mm.

  According to this configuration, the tearing direction starting from the notch can be more surely set to the upward direction or the downward direction.

  In the above-mentioned one mode, the 1st cut part formed in a straight line in the middle layer or the outer layer of the 1st laminated film, and the 2nd cut formed in a straight line in the middle layer or the outer layer of said 2nd laminated film. The first notch and the second notch may be provided so as to intersect the extending direction of the center line that bisects the V-shaped tip.

  According to this configuration, a step is formed at the edge of the opening formed by opening, and the opening can be a bag that can be easily opened.

  In the above-mentioned one aspect, a circulation passage is formed in the band-shaped seal portion to circulate the contents to the outside when the bag is opened, and the notch extends in the extending direction of the center line that bisects the V-shaped tip portion. May be formed to face the distribution passage.

  According to this configuration, the flow passage can be opened to reliably form the spout.

  In the above aspect, an unsealing tape for unsealing the bag is provided on the inner surface of the bag, and the notch is such that the extending direction of the center line that bisects the V-shaped tip portion is directed toward the unsealing tape. May be formed in.

  According to this configuration, the user can easily hold the opening tape to open the bag.

According to the present invention, from those first planned position during the bag making, even if the forming position of the notch is shifted, it is possible to tear the film in a manner of interest.

It is a schematic diagram of a bag with a notch before opening concerning a 1st embodiment of the present invention. It is the figure which expanded and showed the notch of the bag with a notch which concerns on 1st Embodiment of this invention. It is a partial cross section figure of the upper part of the notched bag before opening which concerns on 1st Embodiment of this invention. It is a cross-sectional view of a punching blade used for manufacturing the notched bag according to the first embodiment of the present invention. It is the figure which expanded and showed the notch at the time of applying a conventionally known notch to the bag which has a notch. It is a schematic diagram of the bag with a notch before opening concerning a 2nd embodiment of the present invention. It is a schematic diagram of the bag with a notch before opening concerning a 3rd embodiment of the present invention. It is a fragmentary sectional view of the notch bag before opening which concerns on 3rd Embodiment of this invention. It is the figure which expanded and showed the notch of the bag with a notch which concerns on 4th Embodiment of this invention. It is a cross-sectional view of a punching blade used for manufacturing a notched bag according to a fourth embodiment of the present invention. It is the figure which expanded and showed the opening part of the bag with a notch which formed the notch which concerns on 1st Embodiment of this invention.

  The notched bag of the present invention will be described below with reference to the drawings.

[First Embodiment]
Hereinafter, the first embodiment of the notched bag of the present invention will be described as an example.
FIG. 1 is a schematic view of a notched bag 1A before opening according to the present embodiment, and FIG. 2 is an enlarged view of a notch 9 included in the notched bag 1A of FIG. FIG. 3 is a partial vertical cross-sectional view of the upper portion of the notched bag 1A of FIG. In the following description, the upper side and the lower side are the upper side and the lower side of the notched bag 1A in the drawings, and the horizontal direction is the left-right direction of the notched bag 1A, that is, the direction vertical to the vertical direction. .

  As shown in FIG. 3, the notched bag 1A is formed in a bag shape by laminating a pair of opposed laminated films 2A and 2B. The laminated films 2A and 2B become the front film 6A or the back film 6B of the notched bag 1A. The notched bag 1A is opened by tearing and cutting the upper portion 5 from the notches 9 formed on the side portions 3 and 3 by the user.

  As shown in FIG. 1, the side edges 3, 3 of the two laminated films 2A, 2B and the peripheral portions of the upper part 5 and the lower part 4 are pasted together in a strip shape so that the notched bag 1A has a rectangular shape. The band-shaped seal portion 10 is formed. Thus, the two laminated films 2A and 2B form the front film 6A and the back film 6B of the notched bag 1A. Then, the contents are put into the notched bag 1A before any one of the band-shaped seal portions 10 is finally attached. In addition, the bonding of the band-shaped seal portion 10 is performed by heat sealing using a heat seal bar in this example.

  Further, the notched bag 1A according to the present embodiment has the chuck 7 on the inner surface, and can be resealed even after the upper portion 5 is torn from the notch 9 and opened.

  Further, in the notched bag 1A according to the present embodiment, as shown in FIGS. 1 to 3, linear cut portions 25A and 25B are formed in the horizontal direction with different vertical positions. These notches 25A and 25B are provided in the layers inside the laminated films 2A and 2B, and serve as the edges of the opening formed by tearing and opening the notched bag 1A, and serve as the outer contour of the opening. Since the cut portions 25A and 25B have steps, when one edge of the opening is formed, the single laminated film 2A or the laminated film 2B can be easily visually recognized and easily grasped. As a result, the notched bag 1A It becomes easy to open. The step difference between the cut portions 25A and 25B may be in the range of 0.4 to 10 mm, and is preferably 0.8 to 5 mm.

  In addition, the notched bag 1A according to the present embodiment is provided with the notch 9 serving as a trigger when the bag is torn and opened to the strip-shaped seal portions 10 on both side portions 3 and 3.

FIG. 2 shows an enlarged view of the notch 9 according to this embodiment. FIG. 2A is an enlarged view showing each component of the notch 9, and FIG. 2B is an enlarged view required for explaining the angle of the V-shaped tip 11.
The notch 9 is formed by cutting the band-shaped seal portion 10 so that the portion which becomes the tear start portion when the notch 9 is opened becomes the V-shaped tip portion 11. Specifically, the notch 9 is formed by two linear portions 12A and 12B, a V-shaped tip portion 11, and two connecting portions 13A and 13B connecting these.

  The two linear portions 12A and 12B are formed so that the side portion 3 of the notched bag 1A is the base end and the direction is a right angle with respect to the extending direction of the band-shaped seal portion 10 (the vertical direction of the notched bag 1A). ing. The two linear portions 12A and 12B are separated by 2 mm and are parallel to each other.

The V-shaped tip portion 11 is provided at a position apart from between the two parallel linear portions 12A and 12B. In other words, the most distal end portion 14 of the V-shaped tip portion 11 is provided at a position below the lower linear portion 12B. The tip portion 14 is between two parallel straight portions 12A and 12B, that is, a position below the upper straight portion 12A and a position above the lower straight portion 12B, or the same as the straight portion 12B. It may be provided in a position.
The center line 11c, which is a virtual line that virtually divides the V-shaped tip portion 11 into two at an angle, is inclined with respect to the vertical direction of the notched bag 1A. More specifically, the center line 11c has an angle θ of 36 degrees with the straight line A parallel to the band-shaped seal portion 10.
The angle θ between the center line 11c and the straight line A parallel to the band-shaped seal portion 10 may be 10 degrees to 70 degrees, preferably 10 degrees to 60 degrees, and 10 degrees to 50 degrees. More preferably, and even more preferably 20 to 50 degrees.

The angle φ formed by the two straight lines B and C extending from the tip of the V-shaped tip 11 toward the end is 50 degrees.
The angle φ formed by the two straight lines B and C varies depending on the angle θ formed by the center line 11c that bisects the V-shaped tip portion 11 and the straight line A that is parallel to the band-shaped seal portion 10, but from 20 degrees. It is 80 degrees, and more preferably 40 to 60 degrees.

As described above, in the notched bag 1A, the angle θ formed by the center line 11c that bisects the V-shaped tip portion 11 and the straight line A parallel to the band-shaped seal portion 10 is 10 degrees to 70 degrees, and therefore V The cutting direction starting from the letter-shaped tip 11 is upward or downward with respect to the notched bag 1A. That is, by forming the notch 9 so that the V-shaped tip portion 11 faces downward, the tearing direction of the notched bag 1A surely faces downward. On the other hand, by forming the notch 9 so that the V-shaped tip portion 11 faces upward, the tearing direction of the notched bag 1A surely faces upward.
In this way, the notched bag 1A allows the tearing direction starting from the notch 9 to be an arbitrary direction (downward in the present embodiment), and the film can be torn in a desired direction.

It is preferable that the most distal end portion 14 of the V-shaped tip portion 11 has a slight roundness rather than sharpening as sharply as possible. To be precise, for example, it has a rounded arc shape, and the diameter of the arc. (Radius of curvature) is 3/100 mm to 30/100 mm, preferably 5/100 mm to 25/100 mm.
The sharper the tip 14 of the V-shaped tip 11 is, the lower the resistance at the time of starting tearing due to the force concentrated on the tip is, and the tearing is easily started. However, if the tip end portion 14 of the V-shaped tip portion 11 is sharpened, it tends to be difficult to guide the tearing direction to a certain direction, and the notched bag 1A is different from the V-shaped tip portion 11 in various directions. Torn easily. Although the exact reason is not clear, by giving the V-shaped tip 11 a slight roundness, the resistance at the start of tearing is higher than when there is no roundness, and the direction of the force concentrated on the tip is increased. It is considered that the tearing direction is induced because the tearing starts after the are aligned in the direction along the V shape.

As described above, the linear portions 12A and 12B and the V-shaped tip portion 11 are connected by the connecting portions 13A and 13B. That is, the V-shaped tip portion 11 is connected to the side edge of the notched bag 1A via the connection portions 13A and 13B.
In the notched bag 1A, by making the connecting portions 13A and 13B have a curved shape, no matter whether the force is applied to the notch 9 in the upward direction, the parallel direction, or the downward direction, the force follows the curved shape. The force concentrates on the V-shaped tip 11 in the direction of the broken line. Therefore, regardless of the direction of the force applied to the notch 9, the force is concentrated in the tip direction of the V-shaped tip portion 11, the tearing direction is guided along the line that is the tip direction, and the laminated film 2A, 2B is cut.
The notch 9 in which the curved connecting portions 13A and 13B and the V-shaped tip portion 11 are continuously formed as described above surely imparts the cutting directionality.

  The connecting portions 13A and 13B are preferably curved with a radius of curvature of 0.5 mm to 3 mm. Further, the connecting portions 13A and 13B do not necessarily have to have a curved shape, and the shape is not limited to this as long as the linear portions 12A and 12B and the V-shaped tip portion 11 are smoothly connected. Further, of the connecting portions 13A and 13B, the connecting portion 13B, which is closer to the V-shaped tip portion 11, has almost no force applied thereto, and therefore may not have a curved shape and may be a straight bent portion without the connecting portion.

  The notch 9 according to the present embodiment has a cross section of the cutting edge of the punching blade 15 used in the punching device used for manufacturing the notch as shown in the outline of FIG. Then, by punching with a punching device with a punching blade 15, a part of the planned cutting portion before the bags that are continuously manufactured in the bag manufacturing process are cut into individual bags. A notch 9 is formed in a region which will be the side portion 3.

  Further, as shown in FIG. 3, the notched bag 1A according to the present embodiment includes a chuck 7 as a reclosable means that enables resealing even after opening on the inner surface of the bag. The chuck 7 has a pair of male members 7A and female members 7B that can be engaged.

  The laminated films 2A and 2B are composed of a base material layer 20 on the surface, a heat fusion layer 22 on the innermost surface, and an intermediate layer 21 between these layers. The intermediate layer 21 according to the present embodiment is provided with two layers of a barrier layer 23 and a functional layer 24.

The film used for the base material layer 20, which is the outer layer, is preferably a film having excellent physical strength such as puncture strength, tensile strength, and impact resistance, and excellent printability. Examples of such a film include a film made of a synthetic resin such as polyester, polyamide, polypropylene, polycarbonate, and polyacetal.
As the barrier layer 23, the same film as the barrier film used for the base material layer 20 can be used, and a metal foil such as an aluminum foil or the like may be used. The functional layer 24 is made of biaxially stretched nylon in order to impart physical strength (mechanical strength) such as puncture strength, tensile strength, and impact resistance to the laminated films 2A and 2B.
Examples of the film (sealant film) used for the heat fusion layer 22 include polyolefin resins such as polyethylene and polypropylene.

Then, the functional layer 24 according to the present embodiment is provided with cut portions 25A and 25B.
The notches 25A and 25B have different positions in the vertical direction of the notched bag 1A between the front film 6A and the back film 6B of the notched bag 1A and are located above the chuck 7 and parallel to the upper end portions 36A and 36B of the chuck 7. It is provided so that.

The cutouts 25A and 25B are positions where the film forming the intermediate layer 21 is continuously or intermittently cut at positions that are supposed to be the edges of the opening formed by unsealing. Yes, it functions as a guide line or an opening assisting line when opening the notched bag 1A.
Such cuts 25A and 25B can be manufactured by laser processing or a blade.

The positional relationship between the notch 9 and the notches 25A and 25B according to this embodiment is as follows.
The V-shaped tip portion 11 forming the notch 9 is formed such that the angle φ formed by the straight line A and the straight line B is an acute angle, and is inclined downward toward the cut portions 25A and 25B. That is, the extending direction of the center line 11c, which is the tip direction of the V-shaped tip 11, is not parallel to the cut portions 25A and 25B but is an angle (for example, 20 to 80 degrees, preferably 30 to 80 degrees, more preferably 40 to 80 degrees, and more preferably 40 to 70 degrees), and is formed so as to be inclined with respect to the cut portion 25A or the cut portion 25B. That is, the notches 25A and 25B are provided so as to intersect with the extending direction of the center line 11c, which is the tip direction of the V-shaped tip 11, on the bag surface. In addition, the curved shape of the connection portions 13A and 13B is such that the radius of curvature of the upper side (the side opposite to the cut portions 25A and 25B) is smaller than the radius of curvature of the lower side (the cut portions 25A and 25B side).

Next, the function and effect of the notched bag 1A of the present embodiment will be described.
In FIG. 1, the V-shaped tip portion 11 of the notch 9 faces downward in the notched bag 1A, and the notches 25A and 25B and the chuck 7 are located in the tip direction.
In order to open the notched bag 1A, the user of the notched bag 1A applies force to the place where the notch 9 is formed. In this case, even if a force is applied to the notch 9 either in the upward direction, the parallel direction (the direction parallel to the straight line portions 12A and 12B), or the downward direction, the force is curved in the connecting portions 13A and 13B of the notch 9. The force concentrates on the most distal end portion 14 of the V-shaped tip portion 11 in the line direction along the shape. Then, after the force concentrated on the most distal end portion 14 of the V-shaped tip portion 11 becomes a force that slightly exceeds the tear resistance, the tearing direction is guided toward the tip direction of the V-shaped tip portion 11 and tearing starts. To do. This tear progresses toward the cut portions 25A, 25B, and after the tear reaches the cut portions 25A, 25B, the tear progresses along the cut portions 25A, 25B having a weak film strength, As a result, the upper portion 5 is broken and the notched bag 1A is opened.

  The cutouts 25A and 25B are formed such that the front film 6A and the back film 6B have different vertical positions of the notched bag 1A and have a step and are parallel to the chuck 7. Becomes Due to such cuts 25A and 25B, a step is formed at the edge of the opening formed by unsealing, and as can be understood from FIG. 3, in the notched bag 1A, the film of the back film 6B projects more than the front film 6A. It will be. For this reason, the user can easily visually recognize the protruding edge of the back film 6B, so that one of the films can be easily grasped with fingers, and the notched bag 1A becomes an easily opened bag.

In addition, the force is concentrated on the tip of the notch with the notch, the V notch, the U notch, and the I notch used as the tear opening start means of the conventionally known notched bag 1A, as well as the notch whose tip is oriented in the horizontal direction of the packaging bag. Then, the opening start position can be determined. However, these conventionally known notches are notches that are expected to be torn in the horizontal direction.
For this reason, as shown in FIG. 5, in order to apply the conventionally known notch 9A to the packaging bag in which the cut portions 25A and 25B are provided in the laminated films 2A and 2B, the notch 9A with respect to the cut portions 25A and 25B is used. It is necessary that the laminated films 2A and 2B and the punching device for forming the notch 9A be accurately aligned and punched so that the positions of the leading ends coincide with each other. Further, when the cut portions 25A and 25B are provided with a step so that the positions in the vertical direction are different from each other, the alignment can be performed only so as to coincide with either one of the cut portions 25A and 25B.
On the other hand, the notch 9 according to the present embodiment may be formed so that the tip direction of the V-shaped tip portion 11 is inclined with respect to the cut portions 25A and 25B, and the notch 9 is formed vertically with the cut portions 25A and 25B. It can be provided by shifting the position to allow a certain range of positional deviation. Therefore, the notched bag 1A does not require accurate alignment between the laminated films 2A and 2B and the notch forming punch device. Therefore, the notched bag 1A requires almost no alignment adjustment time before the start of manufacturing, which is necessary when manufacturing bags of various sizes, and also reduces defects and improves productivity. Here, the positional displacement within a certain range means that the positional displacement within a range of about −2 mm to +2 mm with respect to the reference position is allowed, for example, when the vertical height of the bag is 20 cm.

In addition, when multiple packaging bags filled with contents are shipped in corrugated cardboard, etc., the packaging bags containing the contents overlap each other, causing the packaging bags to bend due to external force received during the handling process. There is. When the packaging bag is bent, the notch becomes the starting point of the bending. Therefore, if the position of the notch and the position of the notches 25A, 25B match, the notches 25A, 25B are more likely to bend because the laminated films 2A, 2B have reduced strength. It is easy to bend. As a result, the packaging bag may be easily deformed and the appearance thereof may be deteriorated, and further, a problem may occur in that a bent portion has a pinhole.
On the other hand, in the notched bag 1A according to the present embodiment, such a problem does not occur because the position of the notch 9 and the positions of the cut portions 25A and 25B are deviated.

In addition, it is possible to suppress the bending of the packaging bag by bending the cut portions 25A and 25B into a shape other than a straight line to some extent. However, it is more complicated to apply a process other than a straight line to the packaging bag, as compared with the linear cut portions 25A and 25B, which can be the same as the transport direction of the laminated film during the production of a large number of packaging bags. Processing is required. Therefore, it is not preferable to form the cut portions 25A and 25B in a shape other than a straight shape, because the bag-making speed cannot be increased and the packaging bag is inexpensive and requires a large amount of supply.
On the other hand, in the notched bag 1A according to the present embodiment, the cutting direction from the V-shaped tip 11 of the notch 9 as a starting point is downward with respect to the notched bag 1A and goes toward the cut portions 25A and 25B. Direction. Therefore, even when the linear notches 25A and 25B are provided, it is not necessary to align the notches 9 and the notches 25A and 25B, which trigger the bending of the bag, and the notches 9 can be provided so as to be offset from each other. In this way, it is preferable to apply the notch 9 according to the present embodiment to the packaging bag because a packaging bag that is not easily bent can be obtained while maintaining a high bag-making speed.

  Further, the cutouts 25A and 25B according to the present embodiment are provided in each of the laminated films 2A and 2B forming the front film 6A and the back film 6B, but a plurality of cutouts may be provided or the cutouts 25A. , 25B may be provided on the base material layer 20 which is an outer layer other than the intermediate layer 21.

  As described above, the notched bag 1A according to the present embodiment is formed in a bag shape by laminating the laminated film 2A and the laminated film 2B facing each other, and the laminated film 2A and the laminated film 2B are formed in the peripheral portion thereof. It has a band-shaped seal portion 10 attached to it. A notch 9 having a V-shaped tip 11 is formed in the band-shaped seal portion 10. The V-shaped tip portion 11 is a V-shaped tip portion in which a center line 11c that divides the V-shaped tip portion 11 into two is inclined with respect to the vertical direction of the notched bag 1A. Due to such a shape of the V-shaped tip 11, the cutting direction starting from the V-shaped tip 11 is upward or downward with respect to the notched bag 1A. Then, the notched bag 1A is torn and opened from the V-shaped tip 11 of the notch 9 provided in the band-shaped seal portion 10.

As described above, in the notched bag 1A according to the present embodiment, the cutting direction starting from the V-shaped tip 11 is downward with respect to the notched bag 1A, and from the V-shaped tip 11 The film is torn in a manner along the notches 25A and 25B where the started tear reaches.
Thus, notched bag 1A according to this embodiment, from a position equivalent first scheduled during bag making, even if the forming position of the notch 9 is displaced, the direction tear starting from the notch 9 and any direction, upward and downward The permissible width of the deviation of the notch 9 formation position in the direction can be increased.

  Further, in the notched bag 1A according to the present embodiment, the notches 9 are formed on both side portions 3 and 3, but not limited to this, the notch 9 may be formed only on one side portion 3.

  Further, the notched bag 1A according to the present embodiment is formed of the base material layer 20, the barrier layer 23 and the functional layer 24 which are the intermediate layers 21, and the laminated films 2A and 2B having the heat-sealing layer 22, The present invention is not limited to this, and the laminated films 2A and 2B may have at least two layers of the base material layer 20 and the heat fusion layer 22 laminated.

Further, the cutouts 25A and 25B according to the present embodiment are continuous cuts, but the cutouts 25A and 25B are not limited to this, and the cutouts 25A and 25B are broken lines (also referred to as discontinuous cuts or perforations) or thin. It may be a band-shaped rough surface having a width.
Further, the notched bag 1A according to the present embodiment is provided with the notches 25A, 25B and the chuck 7, but is not limited to this, and is a notched bag not provided with the notches 25A, 25B and the chuck 7. Good.

[Second Embodiment]
Hereinafter, the notched bag 1B according to the second embodiment of the present invention will be described with reference to FIG.
The notched bag 1B shown in FIG. 6 is formed by bending a laminated film in which the laminated film 2A and the laminated film 2B which face each other are folded, and the belt-shaped seal portion 10 extending in the vertical direction is provided on one side edge. This is a three-sided sealed bag having only one and provided with the notch 9 similar to that of the first embodiment.

  The notched bag 1B is a bag whose opening portion torn from the notch 9 serves as a spout, and a belt-shaped seal portion 10 in which a distribution passage 40 for circulating the contents to the outside when the bag is opened extends vertically. It is formed between the upper band-shaped seal part 10 and the extruded seal part 39 which is extruded inward of the bag. That is, in the notched bag 1B, it is planned that the flow passage 40 starts from the V-shaped tip portion 11 of the notch 9 and is torn at the line indicated by the dotted line D to form the unsealed portion.

  The notch 9 is formed in the band-shaped seal portion 10 such that the extending direction of the center line 11c that bisects the V-shaped tip portion 11 is toward the flow passage 40. That is, the dotted line D serving as the unsealing portion is located in the belt-shaped seal portion 10 in the substantially extending direction of the center line 11c of the V-shaped tip portion 11.

  Here, if a conventionally known notch that cannot guide the tearing direction is applied to the bag in which the flow passage 40 is torn to form the opening portion, the tearing may progress upward from the notch and the spout may not be formed. It was On the other hand, with the notch 9 according to the present embodiment, the tearing direction is reliably guided downward from the V-shaped tip 11 of the notch 9. This means that the tearing direction is guided downward at least in the vicinity of the V-shaped tip portion 11, whereby the tearing progresses to the time of sealing the opening portion, and subsequently, the tearing occurs in the region E of the flow passage 40. proceed. Therefore, the notched bag 1B avoids a situation in which the unsealed portion cannot be opened after being torn, and the spout can be reliably formed in the flow passage 40.

[Third Embodiment]
Hereinafter, the notched bag 1C according to the third embodiment of the present invention will be described with reference to FIGS. 7 and 8.
FIG. 7 is a gusset bag in which a gusset 41 is provided between the front film 6A and the back film 6B. There is no gusset 41 on the upper side, and only two films are stuck together.

  The gusset bag can store a larger amount of content than a flat bag without a gusset, and sometimes exceeds 10 kg and may store about 20 kg of content. The laminated film used for such a large-capacity gusset bag is required to have high strength, and since its thickness is thicker than that of a bag of about 1 kg or less, a large force is required to tear and open the bag.

  The notched bag 1C according to the present embodiment is a high-strength tearing tape for tearing (hereinafter referred to as "tear tape") that allows the notched bag 1C to be torn from the inner surface as shown in the upper sectional view of FIG. 42) is provided. The tear tape 42 is grasped and pulled by the user, and the notched bag 1C is torn to allow the notched bag 1C to be easily opened.

  Here, the tear tape is provided on the inner surface of the packaging bag. Therefore, it is difficult for the user to determine the position of the tear tape when opening the bag. Therefore, in order to make it easier for the user to grasp the tear tape, one or more notches are provided at a specific part of the side where the position where the tear tape is provided and the position in the vertical direction match, and the tear tape is grasped. Clarify the starting position. This means that after the tear tape having a width of about 2 mm to 5 mm is provided, the notches are accurately aligned and provided according to the position of the tear tape. This means that when the packaging bag is manufactured, both the positional displacement when the tear tape itself is attached to a specific position on the packaging bag and the positional displacement when providing the notch are accurately controlled, and accurate alignment is ensured. Required multiple times.

In the notched bag 1C according to the present embodiment, the notch 9 is formed with the V-shaped tip 11 facing upward as shown in FIG. 7, and is provided below the tear tape 42. That is, the notch 9 is formed so that the extending direction of the center line 11 c that bisects the V-shaped tip portion 11 faces the tear tape 42. The center line 11c and the tear tape 42 intersect on the surface of the bag 1C.
When forming the notch 9 according to the present embodiment, as long as the notch 9 is provided below the position of the tear tape 42, it is compared with the positional accuracy in the case where a conventionally known notch is provided at the side of the tear tape 42. The tear tape 42 need not be aligned with the position of the tear tape 42.

  Then, when the notched bag 1C is opened, tearing progresses from the notch 9 thus formed toward the tear tape 42. As a result, the tear tape 42 provided on the inner surface of the notched bag 1C is exposed, so that the user can easily grasp the tear tape 42, and the notched bag 1C can be easily opened.

[Fourth Embodiment]
The notch according to the fourth embodiment of the present invention will be described below with reference to FIGS. 9 and 10.
FIG. 9 is an enlarged view of the notch 50 according to this embodiment. 9A is an enlarged view showing each component of the notch 50, and FIG. 9B is an enlarged view required for explaining the angle of the V-shaped tip 11 of the notch 50. The same components in FIG. 9 as those in FIG. 2 are designated by the same reference numerals as those in FIG. 2 and their explanations are omitted.

  The notched bag in which the notch 50 is formed is similar to the notched bag 1A according to the first embodiment, but not limited to this, the notch 50 may be formed in the notched bags 1B and 1C.

The notch 50 is formed by the two linear portions 12A and 12B, the V-shaped tip portion 11, and the connecting portion 13A connecting the linear portion 12A and the V-shaped tip portion 11A. Thus, V Jijo tip 11, one end via a connecting portion 13A which is curved to connect with the edge of the side 3 of the notched bag 1A, the other end notched bag 1A through the linear portion 12A It is connected to the edge of the side portion 3 and does not have the connecting portion 13B like the notch 9 according to the first embodiment.
Therefore, the tip portion 14 of the V-shaped tip portion 11 is provided in the vertical direction of the straight portion 12B. The straight line C overlaps the straight line portion 12B.

  The notch 50 is formed so that the straight line portion 12B (straight line C) is perpendicular to the band-shaped seal portion 10 (straight line A) and is below the straight line portion 12A, thereby forming the notched bag 1A. The tearing direction of is surely downward.

  The notch 50 according to the present embodiment has a cross section of the cutting edge of a punching blade 51 used in a punching device used for notch manufacturing, in a shape as shown in the outline of FIG. The cross section of the punching blade 51 has a substantially trapezoidal shape in which the corner of the upper base is chamfered and the corner of the lower base can form the V-shaped tip 11.

Here, like the notch 9 according to the first embodiment, when the notch 9 is formed so that the V-shaped tip portion 11 faces downward, both ends of the opening of the notched bag 1A are shown in FIG. Thus, the straight portion 12B, the connecting portion 13B, and the V-shaped distal end portion 11 have a dissection shape, that is, a corner portion 52 resulting from the shape of the notch 9. Since the corners 52 project more than parts other than the both ends of the opening, the appearance of the notched bag 1A is deteriorated, and when the rigidity becomes high depending on the material and thickness of the laminated film, the user can You may feel pain when you touch it.
On the other hand, in the notch 50 according to the present embodiment, the straight portion 12B of the V-shaped tip portion 11 is below the straight portion 12A, that is, when the notched bag 1A is opened, both ends of the opening are straight portions. By being formed so as to have the shape of 12B, the corner portion 52 is not formed in the opening when the notched bag 1A is opened, and the opening becomes substantially linear.
As described above, the notched bag 1A having the notch 50 formed therein has an opening that is substantially linear, so that the appearance of the opening can be improved, and the pain when the user touches the opening with a finger is reduced. It is possible to reduce the ease of feeling.

  The present invention has been described above using the above-described embodiments, but the technical scope of the present invention is not limited to the scope described in the above-mentioned embodiments. Various modifications or improvements can be added to the above-described embodiments without departing from the scope of the invention, and the modified or modified embodiments are also included in the technical scope of the present invention.

  For example, the shape of the notched bag exemplified in each of the above embodiments is not particularly limited to the shapes of the three-sided bag, the four-sided bag, and the gusset bag, and may be a standing bag of the bottom gusset.

1A, 1B, 1C Notched bag 2A Laminated film 2B Laminated film 9 Notch 11 V-shaped tip 11c Centerline 14 Cutting edge portion 20 Base material layer 21 Intermediate layer 24 Functional layer 25A Notched portion 25B Notched portion 40 Distribution channel 41 Machi 42 tear tape 50 notches

Claims (8)

A first laminated film and a second laminated film which are opposed to each other are laminated to form a bag-like shape, and the first laminated film and the second laminated film are bonded to each other at their upper and lower portions and peripheral portions of both side portions. A notched bag which has a seal part and is torn from a V-shaped tip of a notch provided in the seal part to be opened.
The notch has two linear portions, the V-shaped tip portion, and two connecting portions that connect the two linear portions and the V-shaped tip portion,
The two linear portions are formed parallel to each other in the vertical direction such that the end edges of the side portions of the bag are base ends and are perpendicular to a direction in which the seal portion extends,
The notched bag, wherein the V-shaped tip portion is a V-shaped tip portion in which a center line that divides the V-shaped tip portion into two is inclined with respect to the vertical direction of the bag.   The notched bag according to claim 1, wherein the two connecting portions are formed by being curved in the same direction with different radii of curvature. The angle between a straight line parallel to the seal portion of the strip with the center line bisecting the V Jijo tip to claim 1 or claim 2, characterized in that it is 70 degrees from 10 degrees Notched bag as described. The notched bag according to any one of claims 1 to 3, wherein a distal end portion of the V-shaped tip portion has an arc shape with a radius of curvature of 3/100 mm to 30/100 mm. A first notch formed linearly in the middle layer or the outer layer of the first laminated film;
A second notch formed linearly in the middle layer or the outer layer of the second laminated film;
Have
Wherein the first slit portion and the second slit portion, one of claims 1 to 4 provided so as to intersect the extending direction of the center line bisecting the V Jijo tip 1 The notched bag according to item.   The notched bag according to claim 5, wherein the first notch and the second notch are formed at different positions in the vertical direction. The strip-shaped seal portion is formed with a flow passage for circulating the contents to the outside when the bag is opened,
The notch according to claim 1, wherein the notch is formed such that the extending direction of the center line that bisects the V-shaped tip portion is toward the flow passage. An opening tape for opening the bag is provided on the inner surface of the bag,
The notched bag according to any one of claims 1 to 7, wherein the notch is formed such that an extending direction of the center line that divides the V-shaped tip portion toward the opening tape is toward the opening tape. .

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